| OTOregon Tool - Oregon (IL) | Oregon | IL | Machinery Manufacturing333111 | 100-499 | ◐ LIKELY ACTIVE |
| OCOSG Carol Stream | Carol Stream | IL | Printing and Related Support Activities323111 | 100-499 | ◐ LIKELY ACTIVE |
| OUOSG USA, Inc Bensenville | Bensenville | IL | Machinery Manufacturing333515 | 100-499 | ◐ LIKELY ACTIVE |
| OUOSG USA, Inc St. Charles | St. Charles | IL | Machinery Manufacturing333515 | 100-499 | ◐ LIKELY ACTIVE |
| OOsk | Aurora | IL | Food Manufacturing311340 | 100-499 | ◐ LIKELY ACTIVE |
| OHOur Home | Kankakee | IL | Food Manufacturing311919 | 100-499 | ◐ LIKELY ACTIVE |
| PSPallet Sales and Recycling | East Saint Louis | IL | Wood Product Manufacturing321920 | 100-499 | ◐ LIKELY ACTIVE |
| PSPanel Shop | New Lenox | IL | Machinery Manufacturing333612 | 100-499 | ◐ LIKELY ACTIVE |
| PCParkson Corporation Vernon Hills | Vernon Hills | IL | Machinery Manufacturing333318 | 100-499 | ◐ LIKELY ACTIVE |
| PNPCS Naperville | Naperville | IL | Computer and Electronic Product Manufacturing334419 | 100-499 | ◐ LIKELY ACTIVE |
| PRPentair - Roselle | Roselle | IL | Machinery Manufacturing333318 | 100-499 | ◐ LIKELY ACTIVE |
| PVPerfetti Van Melle USA - Rockford | Loves Park | IL | Food Manufacturing311340 | 100-499 | ◐ LIKELY ACTIVE |
| PPeru | Peru | IL | Plastics and Rubber Products Manufacturing326150 | 100-499 | ◐ LIKELY ACTIVE |
| PNPilkington NSG | Ottawa | IL | Nonmetallic Mineral Product Manufacturing327211 | 100-499 | ◐ LIKELY ACTIVE |
| P1Plant 1 | Dixon | IL | Machinery Manufacturing333613 | 100-499 | ◐ LIKELY ACTIVE |
| PPlasticade | Please Select | IL | Plastics and Rubber Products Manufacturing326199 | 100-499 | ◐ LIKELY ACTIVE |
| PIPlasticade Inc. | Des Plaines | IL | Plastics and Rubber Products Manufacturing326199 | 100-499 | ◐ LIKELY ACTIVE |
| PCPlibrico Company LLC | Northbrook | IL | Nonmetallic Mineral Product Manufacturing327120 | 100-499 | ◐ LIKELY ACTIVE |
| PKPMI Kyoto Packaging Systems | Elk Grove Village | IL | Machinery Manufacturing333993 | 100-499 | ◐ LIKELY ACTIVE |
| PPolyScience | Niles | IL | Computer and Electronic Product Manufacturing334513 | 100-499 | ◐ LIKELY ACTIVE |
| PSPower Solutions Group | Rolling Meadows | IL | Electrical Equipment, Appliance & Component Manufacturing335931 | 100-499 | ◐ LIKELY ACTIVE |
| PFPrairie Farms Olney | Olney | IL | Food Manufacturing311511 | 100-499 | ◐ LIKELY ACTIVE |
| PPregis -Corporate | Chicago | IL | Plastics and Rubber Products Manufacturing326150 | 100-499 | ◐ LIKELY ACTIVE |
| PIPremier IL | Belleville | IL | Electrical Equipment, Appliance & Component Manufacturing335221 | 100-499 | ◐ LIKELY ACTIVE |
| PSPretium St. Charles | Saint Charles | IL | Plastics and Rubber Products Manufacturing326160 | 100-499 | ◐ LIKELY ACTIVE |
| PIPrimary Ingredients LLC | Decatur | IL | Food Manufacturing311221 | 100-499 | ◐ LIKELY ACTIVE |
| PWPublic Works | Libertyville | IL | Fabricated Metal Product Manufacturing332313 | 100-499 | ◐ LIKELY ACTIVE |
| PFPure's Food Specialties LLC BH2 | Broadview | IL | Food Manufacturing311821 | 100-499 | ◐ LIKELY ACTIVE |
| PFPure's Food Specialties LLC BH3 | Bedford Park | IL | Food Manufacturing311821 | 100-499 | ◐ LIKELY ACTIVE |
| PFPure's Food Specialties LLC BH5 | Norhtlake | IL | Food Manufacturing311821 | 100-499 | ◐ LIKELY ACTIVE |
| PFPure's Food Specialties, LLC BH6 | Melrose Park | IL | Food Manufacturing311821 | 100-499 | ◐ LIKELY ACTIVE |
| QQuincy | Quincy | IL | Computer and Electronic Product Manufacturing334220 | 100-499 | ◐ LIKELY ACTIVE |
| RLRadienz Living | Mount Prospect | IL | Chemical Manufacturing325611 | 100-499 | ◐ LIKELY ACTIVE |
| RTR&D Thiel | Belvidere | IL | Wood Product Manufacturing321992 | 100-499 | ◐ LIKELY ACTIVE |
| RIRenishaw Inc-West Dundee, IL | West Dundee | IL | Computer and Electronic Product Manufacturing334513 | 100-499 | ◐ LIKELY ACTIVE |
| RERichardson Electronics, Ltd. | LaFox | IL | Computer and Electronic Product Manufacturing334419 | 100-499 | ◐ LIKELY ACTIVE |
| RMRichardson Manufacturing Company | Springfiled | IL | Fabricated Metal Product Manufacturing332710 | 100-499 | ◐ LIKELY ACTIVE |
| RPRich Products Niles | Niles | IL | Food Manufacturing311514 | 100-499 | ◐ LIKELY ACTIVE |
| RFRidley Feed Ingredients | Mendota | IL | Food Manufacturing311119 | 100-499 | ◐ LIKELY ACTIVE |
| RBRise Baking Company | Manteno | IL | Food Manufacturing311812 | 100-499 | ◐ LIKELY ACTIVE |
| RRockfon | Chicago | IL | Fabricated Metal Product Manufacturing332323 | 100-499 | ◐ LIKELY ACTIVE |
| RCRps Carol Stream | Carol Stream | IL | Electrical Equipment, Appliance & Component Manufacturing335314 | 100-499 | ◐ LIKELY ACTIVE |
| RLRuggable LLC - Chicago | Bedford Park | IL | Textile Product Mills314110 | 100-499 | ◐ LIKELY ACTIVE |
| SCSabert Corporation 5490 | Chicago | IL | Paper Manufacturing322212 | 100-499 | ◐ LIKELY ACTIVE |
| SESaint Elmo IL | Saint Elmo | IL | Food Manufacturing311999 | 100-499 | ◐ LIKELY ACTIVE |
| SCSchuman Cheese Elgin | Elgin | IL | Food Manufacturing311513 | 100-499 | ◐ LIKELY ACTIVE |
| SFScot Forge - Spring Grove | Spring Grove | IL | Fabricated Metal Product Manufacturing332111 | 100-499 | ◐ LIKELY ACTIVE |
| SASealed Air Corp | Hodgkins | IL | Plastics and Rubber Products Manufacturing326199 | 100-499 | ◐ LIKELY ACTIVE |
| SLSEL: Lake Zurich, IL | Lake Zurich | IL | Electrical Equipment, Appliance & Component Manufacturing335314 | 100-499 | ◐ LIKELY ACTIVE |
| SWSG360 Wheeling | Wheeling | IL | Printing and Related Support Activities323111 | 100-499 | ◐ LIKELY ACTIVE |